Revision of Bledius and related genera. Part 2, The armatus, basalis, and melanocephalus groups (Coleoptera, Staphylinidae, Oxytelinae). Bulletin of the AMNH ; v. 157, article 2

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New York : American Museum of Natural History
"In the present paper, the second of a three part series on Bledius, the armatus, basalis, and melanocephalus groups from the Nearctic region are discussed. In addition to a revised key to the species groups of the New World, illustrations, keys, diagnoses and distributional and habitat data are presented for each species. Bledius notialus, B. aquilonarius, and B. thinopus are newly described. Bledius cuspidatus Le Conte, B. agonus Casey, B. tenuis Casey, and B. nelsoni Hatch are new junior synonyms of B. flavipennis Le Conte. Bledius lectus Casey, B. piceus Fall, B. specularis Fall, B. regularis Fall, and B. condonensis Hatch are new junior synonyms of B. opacifrons Le Conte. Bledius nigriceps Notman is a new junior synonym of B. politus Erichson. Bledius gradatus Fall and B. boddyi Hatch are new junior synonyms of B. eximius Casey. Bledius arizonensis Fall is a new junior synonym of B. strenuus Casey. Bledius ignavus Casey and B. misellus Casey are new junior synonyms of B. basalis Le Conte. Bledius confinus Fall is a new junior synonym of B. melanocephalus (Say). Bledius melanocephalus (Say), the only species in the melanocephalus group, is recognized and discussed for the first time in more than 150 years. Bledius cordatus (Say), B. basalis Le Conte, B. turbulentus Casey, B. dimidiatus Le Conte, B. opaculus Le Conte, B. neglectus Casey, and B. thinopus, new species, comprise the basalis group and, but for B. dimidiatus, all live on the coast of eastern North America. The armatus group includes B. flavipennis Le Conte, B. nitidiceps Le Conte, B. opacifrons Le Conte, B. ineptus Casey, B. consimilis Fall, B. monstratus Casey, B. fenyesi Bernhauer and Schubert, B. politus Erichson, B. episcopalis Fall, B. eximius Casey, B. bellicus Blackwelder, B. strenuus Casey, B. aquilonarius, new species, and B. notialus, new species. All species of the armatus group except B. politus live principally west of the Mississippi River"--P. 75.
p. 73-172 : ill., maps ; 26 cm.
Includes bibliographical references (p. 170-171) and index.